SERRANA: CoronaVac, the Covid-19 vaccines manufactured by Chinese producer Sinovac, showed an impressive efficacy in preventing the SAR-CoV-2 variant discovered in Brazil as data indicates that deaths and hospitalizations caused by the virus in the town of Serrana, in the region of Ribeirão Preto, decreased by 95 percent and 86 percent, respectively from February to April, after close to 60 percent of residents in the town were vaccinated. Serrana's population inoculated with CoronaVac also indicated a significant decrease of 80 percent in symptomatic cases, according to a statement shared with the Global Times by Sinovac on Tuesday.